html,body {
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    background-color: #ccc;
}
#app {
    width: 100%;
    height: 100%;
}

.el-breadcrumb {
    margin-bottom: 20px;
}
.el-table {
    margin-top: 20px;
}